Last November, Zayn opened up to the world when he revealed he was struggling with anxiety, and an eating disorder.

"When I look back at images of myself from around November 2014, before the final tour, I can see how ill I was," he told The Sun.

"Something I've never talked about in public before, but which I have come to terms with since leaving the band, is that I was suffering from an eating disorder.

"It wasn't as though I had any concerns about my weight or anything like that, I'd just go for days - sometimes two or three days straight - without eating anything at all. It got quite serious, although at the time I didn't recognise it for what it was."